Deoxyketohexose isomerase and method for producing deoxyhexose and derivative thereof using same
Providing 1- or 6-deoxy products corresponding to all of aldohexoses, ketohexoses and sugar alcohols, as based on Deoxy-Izumoring, as well as a method for systematically producing those products. A method for producing deoxyketohexose and a derivative thereof using a deoxyketohexose isomerase derived from Pseudomonas cichorii ST-24 (FERM BP-2736), comprising epimerizing 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose at position 3 to produce the individually corresponding 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose as an intended product.
1. A method for producing deoxyketohexose and a derivative thereof, comprising epimerizing a raw material 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose at position 3, using a deoxyketohexose isomerase which is isolated from Pseudomonas cichorii ST-24 (FERM BP-2736), to produce the corresponding 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose as an intended product.
2. A method for producing deoxyketohexose and a derivative thereof according to claim 1 , where the derivative is prepared by reducing deoxyketohexose, the method comprising reducing the intended product 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose to generate the corresponding 1-deoxy D-sugar alcohol or 6-deoxy D-sugar alcohol, or 1-deoxy L-sugar alcohol or 6-deoxy L-sugar alcohol as a derivative thereof.
3. A method for producing deoxyketohexose and a derivative thereof according to claim 1 , where the derivative is prepared by reducing deoxyketohexose followed by oxidation, the method comprising reducing the intended product 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose to generate the corresponding 1-deoxy D-sugar alcohol or 6-deoxy D-sugar alcohol, or 1-deoxy L-sugar alcohol or 6-deoxy L-sugar alcohol as a derivative thereof, and then oxidizing the 1-deoxy D-sugar alcohol or 6-deoxy D-sugar alcohol, or 1-deoxy L-sugar alcohol or 6-deoxy L-sugar alcohol to produce the corresponding 6-deoxy D-ketohexose or 1-deoxy D-ketohexose or 6-deoxy L-ketohexose or 1-deoxy L-ketohexose.
4. A method for producing deoxyketohexose and a derivative thereof according to claim 1 , where the derivative is prepared by isomerizing 6-deoxyketohexose, the method comprising allowing aldose isomerase to interact with the intended product 6-deoxy D-ketohexose or 6-deoxy L-ketohexose to produce the corresponding 6-deoxy D-aldohexose or 6-deoxy L-aldohexose as a derivative thereof.
5. A method for producing deoxyketohexose and a derivative thereof according to claim 1 , where the derivative is prepared by isomerizing and then reducing deoxyketohexose, the method comprising allowing aldose isomerase to interact with the intended product 6-deoxy D-ketohexose or 6-deoxy L-ketohexose to produce the corresponding 6-deoxy D-aldohexose or 6-deoxy L-aldohexose as a derivative thereof, and allowing aldose reductase to interact with the 6-deoxy D-aldohexose or 6-deoxy L-aldohexose to produce the corresponding 6-deoxy D-sugar alcohol or 6-deoxy L-sugar alcohol.
6. A method for producing deoxyketohexose and a derivative thereof according to claim 1 , where 6-deoxy D-ketohexose or 6-deoxy L-ketohexose as a raw material for enzyme interaction is produced by allowing aldose isomerase to interact with 6-deoxy D-aldohexose or 6-deoxy L-aldohexose to produce the corresponding 6-deoxy D-ketohexose or 6-deoxy L-ketohexose, the method additionally comprising epimerizing the product 6-deoxy D-ketohexose or 6-deoxy L-ketohexose to produce the corresponding 6-deoxy D-ketohexose or 6-deoxy L-ketohexose as the intended product.
7. A method for producing deoxyketohexose and a derivative thereof according to claim 1 , where 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose as a raw material is produced by oxidizing 1-deoxy D-sugar alcohol or 6-deoxy D-sugar alcohol or 1-deoxy L-sugar alcohol or 6-deoxy L-sugar alcohol to produce the corresponding 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose, the method additionally comprising epimerizing the resulting product to produce the corresponding 1-deoxy D-ketohexose or 6-deoxy D-ketohexose or 1-deoxy L-ketohexose or 6-deoxy L-ketohexose as the intended product.
8. A method for producing deoxyketohexose and a derivative thereof according to claim 2 , where polyol dehydrogenase is used or a hydrogenation process using Raney nickel as a catalyst is used, for the oxidation reaction or reduction reaction.
9. A method according to claim 3 , where a bacterial strain IK7 (NITE BP-271) of the genus Enterobacter and with a potency of generating dehydrogenase is used for the oxidation reaction.
10. A method for producing deoxyketohexose and a derivative thereof according to claim 1 , where the raw material 1- or 6-deoxy D-ketohexose or 1- or 6-deoxy L-ketohexose is produced by allowing aldose reductase to interact with 6-deoxy D-aldohexose or 6-deoxy L-aldohexose or via a reduction reaction of organic chemistry, to produce the corresponding 6-deoxy D-sugar alcohol or 6-deoxy L-sugar alcohol and then oxidizing the resulting sugar alcohol to produce the corresponding 1- or 6-deoxy D-ketohexose or 1- or 6-deoxy L-ketohexose, the method additionally comprising epimerizing the 1- or 6-deoxy D-ketohexose or 1- or 6-deoxy L-ketohexose to produce the corresponding 1- or 6-deoxy D-ketohexose or 1- or 6-deoxy L-ketohexose as the intended product.
11. A method for producing deoxyketohexose and a derivative thereof according to claim 5 , where aldose reductase is used or a chemical reduction process is used, for the reduction reaction.
12. A method for producing deoxyketohexose or a derivative thereof according to claim 4 , where L-rhamnose isomerase or other aldose isomerase types are used for the isomerization reaction.
13. A method for producing deoxyketohexose and a derivative thereof according to claim 4 , where L-rhamnose isomerase or other aldose isomerase types are used for the isomerization reaction for isomerization of 6-deoxy L-psicose to 6-deoxy L-altrose.